mirror of
https://git.mills.io/prologic/msgbus.git
synced 2024-06-28 17:51:42 +00:00
100 lines
2.4 KiB
Go
100 lines
2.4 KiB
Go
package main
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import (
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"fmt"
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"os"
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"strings"
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"github.com/mitchellh/go-homedir"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"git.mills.io/prologic/msgbus"
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)
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var configFile string
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// RootCmd represents the base command when called without any subcommands
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var RootCmd = &cobra.Command{
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Use: "msgbus",
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Version: msgbus.FullVersion(),
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Short: "Command-line client for msgbus",
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Long: `This is the command-line client for the msgbus daemon msgbusd.
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This lets you publish, subscribe and pull messages from a running msgbusd
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instance. This is the reference implementation of using the msgbus client
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library for publishing and subscribing to topics.`,
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PersistentPreRun: func(cmd *cobra.Command, args []string) {
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// set logging level
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if viper.GetBool("debug") {
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log.SetLevel(log.DebugLevel)
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} else {
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log.SetLevel(log.InfoLevel)
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}
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},
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}
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// Execute adds all child commands to the root command
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// and sets flags appropriately.
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// This is called by main.main(). It only needs to happen once to the rootCmd.
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func Execute() {
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if err := RootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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func init() {
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cobra.OnInitialize(initConfig)
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RootCmd.PersistentFlags().StringVar(
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&configFile, "config", "",
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"config file (default is $HOME/.msgbus.yaml)",
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)
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RootCmd.PersistentFlags().BoolP(
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"debug", "d", false,
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"Enable debug logging",
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)
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RootCmd.PersistentFlags().StringP(
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"uri", "u", "http://localhost:8000",
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"URI to connect to msgbusd",
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)
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viper.BindPFlag("uri", RootCmd.PersistentFlags().Lookup("uri"))
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viper.SetDefault("uri", "http://localhost:8000/")
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viper.BindPFlag("debug", RootCmd.PersistentFlags().Lookup("debug"))
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viper.SetDefault("debug", false)
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}
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// initConfig reads in config file and ENV variables if set.
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func initConfig() {
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if configFile != "" {
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// Use config file from the flag.
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viper.SetConfigFile(configFile)
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} else {
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// Find home directory.
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home, err := homedir.Dir()
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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viper.AddConfigPath(home)
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viper.SetConfigName(".msgbus.yaml")
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}
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// from the environment
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viper.SetEnvPrefix("MSGBUS")
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viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
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viper.AutomaticEnv() // read in environment variables that match
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// If a config file is found, read it in.
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if err := viper.ReadInConfig(); err == nil {
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fmt.Println("Using config file:", viper.ConfigFileUsed())
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}
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}
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